Weft bobbin for electrical feelers



Nav. 17, 1931. QV, PAYNE 1,832,577

wEFT BoBBIN FOR ELECTRICALFEELERS Filed July 9, 1930 l Z/ v VEN TDH' U5CA R PA KNE:

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Arran/verf,

Patented Nov. 17, 1931 OSCAR V. PAYNE, OF WORCESTER, MASSACHUSETTS,ASSIGNOR KNGWLES LOOM WOR-KS, OF W'ORCESTER, MASSACHUSETTS, A

MASSACHUSETTS PATENT trice TO CROMPTON & COEPGRATON OF WEET BoBBrN nonELECTRICAL Funnnns Application filed July 9,

This invention relates to improvements in bobbins particularly adaptablefor use with electrical weft detectors and also the method of making thebobbin and it is the general object of the invention to provide a bobbinhaving a contacting ferrule or the like which has the body portion ofthe bobbin cast therearound to hold the ferrule in position.

In the weaving,` of fine yarns it is desirable to have as smooth asurface on the bobbin as possible and it is a further object of theinvention so to form the bobbin that there will be practically no grooveor notch between the ferrule and the bobbin to entangle the last coilsof the weft as they are unwound.

Another object of the invention is to pro vide a method for the makingof the bobbin which includes a placing of the tapered ferrule in a moldprior to the introduction of the plastic or powdered material of whichthe oohbin is formed.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination and arrannement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of myinvention is set forth,

Fig. 1 is an elevation of a bobbin made accordingto my presentinvention,

Fig. 2 is a longitudinal central section through a bobbin shown in Fig.1, and

Figs. 3, .il and 5 represent diagrammatically the manner of carrying outthe process of making the bobbin.

The bobbin B comprises a tapered yarn receiving barrel terminating; in atip 11 and having at the opposite end a head 12. A ferrule 13 made ofmaterial capable of establishinn' electric contact between twooppositely charged detector elements 14 and 15, respectively, issecurely fastened to the bobbin and has the surface thereofsubstantially continuous with the external surface of the body of thebobbin. Yarn retaining grooves 16 may be provic ed. and als-o taperedbore 17 to receive the spindle of the winding machine.

The manner of making the bobbin is set 193e. serial No. 46am?.

forth in Figs. 3, t and 5, where it will be seen that the mold 20 has atapered bore 21 of a shape conforming to the external surface of thebobbin before the grooves 16 are cut therein. The mold may have wells 22for receiving excess material in the upper portion thereof and there isprovided a plunger 23 carried by a moving part Q4 capable of beinginserted into and withdrawn from the bore 21.

The walls ofthe bore are conical and conform to the shape of the conicalexternal surface 25of the ferrule 13. The proportions of the ferrule aresuch that when dropped into the bore 21 it will come to rest at theproper position, so that when later put in a loom it will cooperate withthe electrodes 14 and 15. A light wooden or soft tool 26 may be used totap the top end of the ferrule to hold the latter against accidentalmovement.

After the ferrule is placed in the bore as indicated in Fig. 3 asuitable amount of moldable material` such as powdered baltelitedesignated at 27, is poured into the bore as suggested in Fig. e'. Theplunger 23 is then inserted into the bore and guided therein so as tolie centrally with respect thereto, said plunger having' a taper toconform to that desired for the internal bore 17 of the finished bobbin.As the pluna'er moves into 'the bore the powdered material will rise andan)7 excess will overflow into the well 22 to be removed after thebobbin is finished. Heat supplied b v superheated steam may then beintroduced into the chamber 28 surrounding the bore and the powderedmass melted into a homogeneous mass. This operation unites the ferrulewith the bobbin and forces the baltelite around small ears 29 struck infrom the surface of the ferrule to provide anchors. These ears are notconsidered necessary in all cases, as longitudin al movement of theferrule is prevented by the wall 30 of the bobbin at tho smaller end ofAthe ferrule and rot-ation of the ferrule around the aXis of the bobbin,if possible, will not he objectionable in all instances. in order toprevent loosenesa however, with possible consequent resultant spacing;of the ferrule from the shoulder 30 to define a groove into which thethread migat fall, l prefer to use the ears 29. After the bobbin hasbeen formed it is removed from the mold and the grooves 16 outcircumferentially therein.

From the foregoing it will be seen that I have provided a simple form ofbobbin having an electric contact surface held rigidly thereto by havingthe body of the bobbin case therearound. lt will further be seen thatthe method of making the bobbin accurately positions the ferrule withrespect to the ends of the finished bobbin and that there results asmooth yarn engaging surface from which the weft may be nnwound Withoutdanger of breakage. As the plunger' inoves` into the mold the powderIwill be forced upwardly but the ferrule Will be heldin po sition byreason of the fact that it has previously been tapped so as to retainits position in the mold and resist any tendency to rise With thecompond 27.

Having thus described my invention it Will be seen that changes andmodifications may be made therein by those skilled in the art Withoutdeparting from the spirit and scope of theinvention and I do not wish tobe limited to the details herein disclosed, but what I claim is:

l. A bobbin having a yarn receiving surface composed in part by ametallic ferrule and in part by material molded around the ferrule.

2. A bobbin to cooperate with an electrical weft detector, the bobbinhaving a metallic ferrule and a body molded around the ferrule.

3. A bobbin to cooperate With an electrical Weft detector having ametallic ferrule and having a body molded around the ferrule, and heldagainst relative angular motion With respect to the ferrule byprojections on the latter extending into the body of the bobbin.

4. A bobbin having a tapered metallic ferrule forming a portion of yarnreceiving surface thereof and having a body portion 1nolded around theferrule.

5. A bobbin having' a tapered metallic ferrule forming a portion of theyarn receiving surface thereof and having a body portion molded aroundthe ferrule, that portion of the bobbin other than the ferrule whichreeeives the yarn havinga surface substantially continuous With thesurface of the ferrule.

6. A bobbin having a metallic ferrule which is tapered toward the tip ofthe bobbin, the bobbin having a body portion molded around the ferruleand having that portion thereof which has weft Wound thereon and isadjacent the tip end of the ferrule substantially continuous with thesurface of the ferrule.

7. A bobbin having a tapered niet-allie ferrule and having a body moldedaround the ferrule, said bobbin having a head at the OSCAR- V. PAYNE.

